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Ann Clin Microbiol Antimicrob ; 14: 3, 2015 Jan 16.
Article in English | MEDLINE | ID: mdl-25591721

ABSTRACT

BACKGROUND: Nephrotoxicity is an important adverse effect of colistin methanesulfonate (CMS) therapy. No data exist on rates and risk factors for colistin-related nephrotoxicity in Saudi Arabia (SA). We conducted a prospective cohort study to identify rates and risk factors for CMS nephrotoxicity in our patient population. METHODS: We prospectively included adult patients who received ≥48 hours of intravenous CMS therapy. Pregnant patients and those on renal replacement were excluded. Patients received 9 million units (mU) loading dose followed by 3 mU 8 hourly. In renal impairment, CMS dosing was adjusted according to calculated creatinine clearance (CrCl). Nephrotoxicity was defined as per RIFLE criteria (Risk, Injury, Failure, Loss and End-stage renal disease). Statistical analysis was performed using SPSS version 20.0 (IBM, Armonk, New York, USA). The study was approved by the institution's Research Ethics Committee. RESULTS: A total of 67 patients were included in the study. Mean (±standard deviation) age was 57.5 (±24.0) years, Charlson Co-morbidity Score 2.88 (±2.39), CrCl 133.60 (±92.54) mL/min and serum albumin 28.65 (±4.45) g/L. Mean CMS dose was 0.11 (±0.04) mU/kg/day and mean total CMS dose received was 101.21 (±47.37) mU. Fifty-one (76.1%) patients developed RIFLE-defined nephrotoxicity. Mean total CMS dose and duration of therapy before onset of nephrotoxicity were 66.71 (±43.45) mU and 8.70 (±6.70) days, respectively. In bivariate analysis, patients with nephrotoxicity were significantly older (P 0.013) and had lower baseline serum albumin (P 0.008). Multivariate logistic regression identified serum albumin [odds ratio (OR) 0.72; 95% confidence interval (CI) 0.57-0.93; P 0.010] and intensive care admission (OR 16.38; 95% CI 1.37-195.55; P 0.027) as independent risk factors for CMS nephrotoxicity. CONCLUSIONS: High dose intravenous CMS therapy is associated with high rates of nephrotoxicity in SA. Independent risk factors for colistin nephrotoxicity were baseline hypoalbuminemia and intensive care admission.


Subject(s)
Acute Kidney Injury/etiology , Anti-Bacterial Agents/adverse effects , Colistin/adverse effects , Mesylates/adverse effects , Acute Kidney Injury/epidemiology , Adult , Aged , Aged, 80 and over , Anti-Bacterial Agents/administration & dosage , Colistin/administration & dosage , Female , Gram-Negative Bacterial Infections/drug therapy , Humans , Male , Mesylates/administration & dosage , Middle Aged , Pregnancy , Prospective Studies , Retrospective Studies , Saudi Arabia/epidemiology , Young Adult
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